Improvement in grubbing-machines and capstans



' 2"Sh 'eets-Sheet 1.. R. W. BU'RK.

v GRUBIBI'NG MACHINE Arr-n CAPSTANS. -No. 176.926. V Patented May 2,1875;

A Wl NE E INVENTOR ATTORNEYS.

N FEYER$1 PHOTO-LPTHOGRAPHER, WASHINGYON D C 2 Sheets-Sheet Z.

, R. w. BURK.

GRUBBING MACHINE AND CAPSTANS. No.176,926u 'Patented May 2,1876.

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ATTORNEYS.

N.PE|ERS, PHOYO-LITHOGRAPHER, WASHINGION D C cured suitable gear-wheels G G.

INITED STATES ROSWELL W. BURK, OI? PENFIELD, ASSIGNOR OF ONE-HALF HIS RIGHT TO PATENT Orrroa DAVID OWENS, or BEDFORD, MICHIGAN.

IMPROVEMENT IN GRUBBlN G-MACHlN-ES CAPSTANS.

Specification forming part of Letters Patent No. [76,926, dated May 2, 1876; application filed March 30, 1876.

To all whom it may concern.-

Be it known that I, ROSWELL W. BURK, of the town of Penfield, in the county of Calhoun, and in the State of. Michigan, have in- "ented certain new and useful Improvements in Grubbing-Machines and Oapstans; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, making a part of this specification.

This invention relates to capstans, and its especial object is 'to provide a simple and effectual machine for extracting stumps and for other 'agricul'tural purposes; and it consists in connecting toa suitable frame a double Windlass or rope-drum, so arranged with reference to the horse or other power and each other that while one of the drums is being acted on, and the grub to which its chain is attached is being lifted from its bed, or the like, the other shall be out of gear, and its chain or rope free to be attached to another grub or load, thus affording means for'doing a greater amount of work in a given time than is possible with a capstan having a single drum.

In carrying out my invention I provide a strong timber frame, A, provided with'uprights and beams, substantially as .shown inthe drawings. Within this frame I arrange two drums, B B, on the top of which are se- Between these drums, and upon a vertical shaft, a, extending through the upper part of the frame, I arrange the driving-pinion C. On top of cure means of attachment to the drum.

vide, in addition to the horizontal roller F, the

vertical rollers G G.

The drum gear-wheels G G are perforated, as shown at w, to afford convenient and se- Suitable auchoring chains are attached to the frame.

Having thus fully described my invention, what I claim as new, and desire to obtain by Letters Patent, is-.

In combination with the two drums, B B, having gear-wheels G G upon their upper ends, the upright shaft a, provided with driving-pinion U, the eccentric H, sweep D, and lever E, substantially as and for the purposes herein set forth.

-In testimony that I claim the lforegflillg have hereunto set my hand this 21st day of February, 1876.

Q BOSWELL W. BURK.

Witnesses:

DAVID 0. WEST, JOHN MEAGHEM. 

